Video problem with fresh install on Gigabyte GA-J3455N-D3H

I try install OMV 3.0 x64 on new mobo Gigabyte GA-J3455N-D3H
Installer is on DVD, it starts. Initally there is only prompt on left right corner, next about 6 small screen appear but cant read anything (they are too small).
Monitor (old CRT type) is connected via VGA.